Stringed instrument

Back-farmable stringed instruments for the stone mariachis:

Instrument	Zone	Drop rate	Number of monsters	Combat %
acoustic guitarrr	Belowdecks	20%	5	100%
4-dimensional guitar	The Haunted Gallery	5%	3	80%
plastic guitar	The Valley Beyond The Orc Chasm	10%	8	100%
half-sized guitar	South of the Border	?	5	50%
out-of-tune biwa	The Haiku Dungeon	10%	5	90%

Also, a stone banjo can be smithed if you have a spare ten-leaf clover (or big rock), although turns spent fishing in the sewer could exceed turns spent waiting for the right monster.

The massive sitar may be purchased during the war if you fight for the hippies, but the cost in dimes is substantial.